Beginning Mac OS® X Programming

A.13. Chapter 13

A.13.1. Exercise solution

1. Open the Searcher project in Xcode, and select the Searcher.h file in the Groups & Files panel, such that it appears in the editor. Make the highlighted changes in the following code:

   #import <Cocoa/Cocoa.h>
   
   @interface Searcher : NSObject
   {
       IBOutlet NSArrayController *pathsController;
       NSArray *paths;
       NSString *rootDirectoryPath;
       NSString *nameContainsString;
       int searchingState;
       NSTask *task;
   }
   
   -(IBAction)openFile:(id)sender;
   -(IBAction)showInFinder:(id)sender;
   -(IBAction)toggleSearch:(id)sender;
   
   -(NSArray *)paths;
   -(void)setPaths:(NSArray *)paths;
   
   -(NSString *)rootDirectoryPath;
   -(void)setRootDirectoryPath:(NSString *)path;
   
   -(NSString *)nameContainsString;

   -(void)setNameContainsString:(NSString *)str;
   
   -(NSTask *)task;
   -(void)setTask:(NSTask *)task;
   
   -(int)searchingState;
   -(void)setSearchingState:(int)newState;
   
   @end

2. Open the Searcher.m file in the editor and change the init and dealloc methods as follows:

   -(id)init { if ( self = [super init] ) { [self setPaths:[NSArray array]]; [self setRootDirectoryPath:NSHomeDirectory()]; [self setNameContainsString:@""]; [self setSearchingState:NSOffState]; [self setTask:nil]; // Register for NSTask termination notifications [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(taskDidTerminate:) name:NSTaskDidTerminateNotification object:nil]; } return self; } -(void)dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self]; [paths release]; [rootDirectoryPath release]; ...